I always assumed Treble was supposed to be a lion, but according to the internet, he's a robotic wolf.

I'd had an idea to do a storyline centered around Rush and Treble for a while, but I couldn't get it to work due to the lack of good Treble sprites. In the end, I ended up making my own. I also used some sprites from Power Battles and Power Battles, though they always come with the drawback of some minor anti-aliasing.